When picking up an Ammo Box when not wielding a firearm, the ammo will be distributed to the first firearm in the player's inventory (at the top of the list).

Ammo will only be distributed to only one firearm, not to all firearms.

When picking up an ammo box, the ammo obtained will be roughly one (1) magazine. The ammo box may contain: greater than, less than, or the exact ammo amount of the standard magazine size of the player's firearm. This amount of difference depends on the size of the magazine.

Using firearms with low magazine sizes (Ex. Winchester 12, Enfield, M202-A1) excessively when you start/join a game isn't advised until you (the player) have obtained a significant supply of ammo for that firearm.

Ammo boxes are most advised for assault rifle, as picking up these boxes will wield a lot of ammo.

It is advised to scavenge ammo boxes in the day, earlier in the game. It is STRONGLY RECOMMENDED not to go after Ammo Boxes at night, since Zumbis might attack you from behind and quickly decimate your health.